Recent developments in gravitational collapse and spacetime singularities

Pankaj S. Joshi, Daniele Malafarina

Research output: Contribution to journalArticle

94 Citations (Scopus)

Abstract

It is now known that when a massive star collapses under the force of its own gravity, the final fate of such a continual gravitational collapse will be either a black hole or a naked singularity under a wide variety of physically reasonable circumstances within the framework of general theory of relativity. The research of recent years has provided considerable clarity and insight on stellar collapse, black holes and the nature and structure of spacetime singularities. We discuss several of these developments here. There are also important fundamental questions that remain unanswered on the final fate of collapse of a massive matter cloud in gravitation theory, especially on naked singularities which are hypothetical astrophysical objects and on the nature of cosmic censorship hypothesis. These issues have key implications for our understanding on black hole physics today, its astrophysical applications, and for certain basic questions in cosmology and possible quantum theories of gravity. We consider these issues here and summarize recent results and current progress in these directions. The emerging astrophysical and observational perspectives and implications are discussed, with particular reference to the properties of accretion disks around black holes and naked singularities, which may provide characteristic signatures and could help distinguish these objects.

Original languageEnglish
Pages (from-to)2641-2729
Number of pages89
JournalInternational Journal of Modern Physics D
Volume20
Issue number14
DOIs
Publication statusPublished - Dec 31 2011
Externally publishedYes

Fingerprint

Gravitational Collapse
gravitational collapse
naked singularities
Space-time
Singularity
Black Holes
astrophysics
Gravity
Black Hole Physics
gravitation theory
Accretion Disks
gravity
gravitation
clarity
Relativity
Gravitation
cosmology
Quantum Theory
Cosmology
massive stars

Keywords

  • black holes
  • Gravitational collapse
  • naked singularities

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science
  • Mathematical Physics

Cite this

Recent developments in gravitational collapse and spacetime singularities. / Joshi, Pankaj S.; Malafarina, Daniele.

In: International Journal of Modern Physics D, Vol. 20, No. 14, 31.12.2011, p. 2641-2729.

Research output: Contribution to journalArticle

@article{0d2a884db2014921a8676d2e71b028d8,
title = "Recent developments in gravitational collapse and spacetime singularities",
abstract = "It is now known that when a massive star collapses under the force of its own gravity, the final fate of such a continual gravitational collapse will be either a black hole or a naked singularity under a wide variety of physically reasonable circumstances within the framework of general theory of relativity. The research of recent years has provided considerable clarity and insight on stellar collapse, black holes and the nature and structure of spacetime singularities. We discuss several of these developments here. There are also important fundamental questions that remain unanswered on the final fate of collapse of a massive matter cloud in gravitation theory, especially on naked singularities which are hypothetical astrophysical objects and on the nature of cosmic censorship hypothesis. These issues have key implications for our understanding on black hole physics today, its astrophysical applications, and for certain basic questions in cosmology and possible quantum theories of gravity. We consider these issues here and summarize recent results and current progress in these directions. The emerging astrophysical and observational perspectives and implications are discussed, with particular reference to the properties of accretion disks around black holes and naked singularities, which may provide characteristic signatures and could help distinguish these objects.",
keywords = "black holes, Gravitational collapse, naked singularities",
author = "Joshi, {Pankaj S.} and Daniele Malafarina",
year = "2011",
month = "12",
day = "31",
doi = "10.1142/S0218271811020792",
language = "English",
volume = "20",
pages = "2641--2729",
journal = "International Journal of Modern Physics D",
issn = "0218-2718",
publisher = "World Scientific Publishing Co. Pte Ltd",
number = "14",

}

TY - JOUR

T1 - Recent developments in gravitational collapse and spacetime singularities

AU - Joshi, Pankaj S.

AU - Malafarina, Daniele

PY - 2011/12/31

Y1 - 2011/12/31

N2 - It is now known that when a massive star collapses under the force of its own gravity, the final fate of such a continual gravitational collapse will be either a black hole or a naked singularity under a wide variety of physically reasonable circumstances within the framework of general theory of relativity. The research of recent years has provided considerable clarity and insight on stellar collapse, black holes and the nature and structure of spacetime singularities. We discuss several of these developments here. There are also important fundamental questions that remain unanswered on the final fate of collapse of a massive matter cloud in gravitation theory, especially on naked singularities which are hypothetical astrophysical objects and on the nature of cosmic censorship hypothesis. These issues have key implications for our understanding on black hole physics today, its astrophysical applications, and for certain basic questions in cosmology and possible quantum theories of gravity. We consider these issues here and summarize recent results and current progress in these directions. The emerging astrophysical and observational perspectives and implications are discussed, with particular reference to the properties of accretion disks around black holes and naked singularities, which may provide characteristic signatures and could help distinguish these objects.

AB - It is now known that when a massive star collapses under the force of its own gravity, the final fate of such a continual gravitational collapse will be either a black hole or a naked singularity under a wide variety of physically reasonable circumstances within the framework of general theory of relativity. The research of recent years has provided considerable clarity and insight on stellar collapse, black holes and the nature and structure of spacetime singularities. We discuss several of these developments here. There are also important fundamental questions that remain unanswered on the final fate of collapse of a massive matter cloud in gravitation theory, especially on naked singularities which are hypothetical astrophysical objects and on the nature of cosmic censorship hypothesis. These issues have key implications for our understanding on black hole physics today, its astrophysical applications, and for certain basic questions in cosmology and possible quantum theories of gravity. We consider these issues here and summarize recent results and current progress in these directions. The emerging astrophysical and observational perspectives and implications are discussed, with particular reference to the properties of accretion disks around black holes and naked singularities, which may provide characteristic signatures and could help distinguish these objects.

KW - black holes

KW - Gravitational collapse

KW - naked singularities

UR - http://www.scopus.com/inward/record.url?scp=84857228812&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84857228812&partnerID=8YFLogxK

U2 - 10.1142/S0218271811020792

DO - 10.1142/S0218271811020792

M3 - Article

VL - 20

SP - 2641

EP - 2729

JO - International Journal of Modern Physics D

JF - International Journal of Modern Physics D

SN - 0218-2718

IS - 14

ER -